External contracting brake for automobiles



Aug. 14, 1923. I LJlfilfil? s. FEED EXTERNAL CONTRACTING BRAKE FORAUTOMOBILES Filed March 1, 1920 specification.

Patented Aug. 1%, 19223.

, mean era-sir e HORACE SEYMOUR Pnnn, or 'irenses cIrv. 'arrssouar,nests-non, BY MESNE essrewrannrs, 'rosronn it. new, or rearLnAvnnwon-rn, KANSAS.

EXTERNAL eonrnno'rrne BRAKE non nuroaronrnns: I

Application filed. March 1, 1920 Serial llo. 362,461. 7,

T 0 all whom c'tmmy concern:

Be it known that I, HonAon SnYMoUn Pnnn, a'citizen of the United States,residing at Kansas City, in the county of Jack son and State ofMissouri, have invented a new and useful External Contracting Brake forAutomobiles, of which the following is a My invention relates. toexternal contractingbrakes for automobiles, and the object of theinvention is'to provide an inexpensive and which may beeasily andquickly applied on the brake drum of standard automobile brakes, andhaving facility for adjustment adapted for correcting inequalitiesincident to wasting of the-parts. 7 I

I attain this object by means of the mechanism illustratedin theaccompanying draw- 7 ings in which-Figure'1, is a side view of thestandard automobile brake equipped with an external contracting brakeembodying my invention Figure 2, is a side view of the brake, partlybroken, away to disclose the attaching member anddevice attached,

thereon. Figure 3, is an end view of the device. Figure 1, is a top viewof the device and showing the an'gularly disposed contacting levers andthe toggle joint for turning the levers. "Figure 5, is a plan View ofthe inner side of the housing of the limiting stop; 7 V

Simllar numerals of reference refer to corresponding parts throughoutthe several I views. I

Tlie'brake housing 1, mounted on the spindle 2, andprovided with brakedrum 8, is fairly representative of the standard auto- 'mobile'contracting and expanding brake mechanism. The invention comprises asevered metal band 4, having the QUStOIIltLiy bandof brake lining fabric5, on its inner side. Journal bearings 6, are formed integral with theouter sides ofthe end portions of the band 4, andere. disposed transversely thereof and spaced apa'rta suitable distance. Rock shafts 7, arejournaled in the bearings 6, and holes are drilled transversely throughthe shafts between the inner efficient external contracting brake.

which portions are flattened on opposite sides, so that 'the flattenedportions shall closely abut the inner ends of the bearings and therebylocl'r the'nuts and preventtheir travelling onthe rods. The lower endsof the rods 8, are flattened and the flattened portions. provided withpivot holes which register with similar holes through the inner ends 'ofl'evers 11, the latter being'pivotally connected with the rods 8, bypivots 12, which are held in place by' cotter pins" 18 whlch piercethe.projectingends of the pins 12. Pivot holes are provided in the outerendportions of the levers 11, and a toggle joint 14, is connectedbetweenthe levers and is held 1n place by pins 15, which are held I in place bycotter pins 16. The levers 11,

are pivotally mounted on studs 17, arranged for that purpose on anattaching member 18, and held in placebycotter pins 19 which "pierce theendportions of thestuds; The.

attaching member fashioned to substan tially conform to the contour-ofthe lower half of the band 4-, and to extend upwardly in a curved lineto outwardly of the front side of the band'and is provided with boltholes for receiving the brake shoe bolt 20, and the lowermost radius rodbolt 21, on the'brake housing, thereby positioning the studs 17,properly to receive the'levers 11. A motion limiting stop 22, isalsomounted on the end portions of the studs 17, and. comprises a housing23, having an extension, 24, the end portion of which is turned inwardto form alip 25 A rod 26, is extended forwardly through the centralpivot 27, of the toggle joint to a little in advance of the toggle, theouter end of the rod 26, is bent inward to form a toe 28, which isadapted for projecting before the toggle joint to arrest and detain thelatter from opening far enough to assume astraight alignment.-

A retractile spring 29, is mounted on the inner end of the rod 26, andits inner end is attached on the springand its outer end is connectedwith'a plug 30, on the rod, the parts being so arranged that the togglejoint shall engage the toe, 28, and draw the rod outward a distancecalculated to allow the toe to arrest and detain the toggle, thereaction of the spring will draw the rod back to normal position.Compression springs 81, are mounted on the rods 8, and bear on thebearings 6, and on the inner ends of the levers 11.

T ap y t ede iee on he Present brake V housing, the attaching member'lS,is'seeured thereon by removingthe nuts from the brake shoe'bolt and thelowermost radius bolt and entering the bolts mentionedin the holesin themember which are arranged to receive them. Theband e, is then placed inpos tion on the brake drum a-nd'the levers 11 mounted on the studs 17and then thetoge gleilinks areconnected. Themotion hmlting device 22, isthen mounted on the pro-' ecting ends of the studs and the cable 32,:

connected withjthe central pivot pin of the I toggle joint and withtheusual brake lever, 4 not shown, on the automobile, If a pulllng p e su eap li th r c e the tog le ll op and straigh en n the flsiown anne u l hoe n h r 26 r e t he egg est aishten g of th o le 29 as des'eribedeffects a powerful pressure on the levers and the latter turn on thestudsilj, the innerends ofvthe levers pulling onxthe.

ends o h b ake band t ereby .eon

I i ns -he s me and tightening the ti e an th brake.drum. 1

claim isrfl v I r p In an ex e na c nt acti gbrakef r utomobiles', thecombination with the brake hous-f mg having ahr'ake drum, of a severedmetal hand provided with a band of brake lining fabric on itsinnerfside,rock shafts mounted transverse-1y on the/outer side of the end 7 oportions of said band, rods loosely piercing 7 said rock shafts betweenthe bearings of the shafts and screw-threaded outer ends pro-,

vided withnuts' fashioned for looking with Y the rock shafthearings, anattaching mem-,

ber mounted on the brake housing, levers pivoting on said attachingmember and having the rinner ends pivotallyconnected with said rods, atoggle joint pivotingon the outer ends of said. levers and'normallyfolded inwardly of the levers, and means for straightening said togglejoint to simul.- taneously turn said levers and effect the consvtracting of said brake band on the brake drum. i

2. In an external contracting brake forv c automobiles, the" combinationwith the brake hou-slng having a brake drum, of a severed.

metalband provided with a band of brake lining fabricon its inner side,rock shafts e nte ra sve se y 1 th Ou r i of he end po t s of s id bend,r s o sely P rcing sa d ock sh ftsh t een e beer Having describedmvinvention what 1- ingsof the shafts and havingscrewethreaded outer endsprovided" with nuts fashioned for Y looking with the ,u rockshaftbearmgs, an V r attaching member mounted on the brake housing,levers 'pivoting on said attaching member and having their innerendsivotal 1y connected withss'aid rods, a tog'g e joint pivoting on theouter ends of said levers; and normally folded inwardly of the levers, amotion limiting stop arranged at the side ofsaid'levers and adapted@fQradjustablyT limiting the straightening-of said toggle joint, andmeans for straightening Qsaid. mg 7 gle joint to simultaneously turnsaid-r levers r and effectthe contractingof said brake hand I on thebrake drum.

3; In an: external contractingfhrake, the" combination with the brake'drum,-of asev;

ered brake band loosely-mountedonthefbrakel rum, e11 t 'aeh ne mber. mun Q 1 the jhrake drum and having ahearing-cportion- 'at the ends of thebrake band, alever pivotaing' on said attachingrmembenand-havingattachedon said toggle for straightening the toggle and therebyturningsaid levers to, contract sa d brake band on the brake drum.

4. In combination With a drum and a brake band operably associated withsaid 7 drum, a supporting member, means OOH:

nectin'g the rear portion of thejbrake band to said supporting member, apair of levers 'fulcrumed' at the forward end of said sup:

P g em er, mea ep rebly e m ee e 'said levers to the forward portion-10fthe brake band for actuating the-same, a toggle-1- Qp y e m ee e toqse dev rs o aet e the same, means for moving; said toggle-to activeposition, an arm secured to the forward end of'the supportingmemben-anjd a spring'connected to said arm and thetog 1 105 Dated KansasCity, Missouri, February gle to restore thelatter to inactive position.

14th, 1920'. r w o a v oRAc sEYMoUR rut- 211;

i nesse i I Mason F. Siurrrr', Jrz, EV R T L, MOKA a

